Display screen portion with graphical user interface for activity data



The FIGURE is a front view of a display screen or portion thereof with a graphical user interface showing our new design.

The broken line showing of a display panel portion with graphical user interface is included for the purpose of illustrating portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a display screen portion with graphical user interface for activity data, as shown and described. 